The main disadvantages of college students surfing the Internet included: Addiction: Overuse of the Internet can lead to addiction, especially in the virtual world. 2. Information overload: The huge amount of information on the Internet may lead to information overload and confusion. 3. Time management: College students need to manage their time to avoid spending too much time online so as not to affect their studies and other activities. 4. Social problems: Overuse of the Internet can lead to social problems, especially for those who are not good at communicating with others. Physical health problems: Sitting in front of the computer for a long time may cause eye fatigue, headaches, neck pain and other physical health problems. Mental problems: Overuse of the Internet can also lead to mental problems such as depression and anxiety. Learning problems: Overuse of the Internet may affect learning, especially when performing learning tasks that require concentration. College students need to use the Internet appropriately and pay attention to the correct use of the Internet to avoid adverse effects.